package com.tencent.supersonic.headless.chat.parser.llm;

import com.google.common.collect.Lists;
import com.tencent.supersonic.common.pojo.Text2SQLExemplar;
import com.tencent.supersonic.common.service.ExemplarService;
import com.tencent.supersonic.headless.chat.parser.ParserConfig;
import com.tencent.supersonic.headless.chat.query.llm.s2sql.LLMReq;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import static com.tencent.supersonic.headless.chat.parser.ParserConfig.PARSER_EXEMPLAR_RECALL_NUMBER;
import static com.tencent.supersonic.headless.chat.parser.ParserConfig.PARSER_FEW_SHOT_NUMBER;
import static com.tencent.supersonic.headless.chat.parser.ParserConfig.PARSER_SELF_CONSISTENCY_NUMBER;

@Component
@Slf4j
public class PromptHelper {

    @Autowired
    private ParserConfig parserConfig;

    @Autowired
    private ExemplarService exemplarService;

    public List<List<Text2SQLExemplar>> getFewShotExemplars(LLMReq llmReq) {
        int exemplarRecallNumber = Integer.valueOf(parserConfig.getParameterValue(PARSER_EXEMPLAR_RECALL_NUMBER));
        int fewShotNumber = Integer.valueOf(parserConfig.getParameterValue(PARSER_FEW_SHOT_NUMBER));
        int selfConsistencyNumber = Integer.valueOf(parserConfig.getParameterValue(PARSER_SELF_CONSISTENCY_NUMBER));

        List<Text2SQLExemplar> exemplars = Lists.newArrayList();
        llmReq.getDynamicExemplars().stream().forEach(e -> {
            exemplars.add(e);
        });

        int recallSize = exemplarRecallNumber - llmReq.getDynamicExemplars().size();
        if (recallSize > 0) {
            exemplars.addAll(exemplarService.recallExemplars(llmReq.getQueryText(), recallSize));
        }

        List<List<Text2SQLExemplar>> results = new ArrayList<>();
        // use random collection of exemplars for each self-consistency inference
        for (int i = 0; i < selfConsistencyNumber; i++) {
            List<Text2SQLExemplar> shuffledList = new ArrayList<>(exemplars);
            Collections.shuffle(shuffledList);
            results.add(shuffledList.subList(0, Math.min(shuffledList.size(), fewShotNumber)));
        }

        return results;
    }

    public String buildSideInformation(LLMReq llmReq) {
        String currentDate = llmReq.getCurrentDate();
        List<String> sideInfos = Lists.newArrayList();
        sideInfos.add(String.format("CurrentDate=[%s]", currentDate));

        if (StringUtils.isNotEmpty(llmReq.getPriorExts())) {
            sideInfos.add(String.format("PriorKnowledge=[%s]", llmReq.getPriorExts()));
        }

        String termStr = buildTermStr(llmReq);
        if (StringUtils.isNotEmpty(termStr)) {
            sideInfos.add(String.format("DomainTerms=[%s]", termStr));
        }

        return String.join(",", sideInfos);
    }

    public String buildSchemaStr(LLMReq llmReq) {
        String tableStr = llmReq.getSchema().getDataSetName();

        List<String> metrics = Lists.newArrayList();
        llmReq.getSchema().getMetrics().stream().forEach(
                metric -> {
                    StringBuilder metricStr = new StringBuilder();
                    metricStr.append("<");
                    metricStr.append(metric.getName());
                    if (!CollectionUtils.isEmpty(metric.getAlias())) {
                        StringBuilder alias = new StringBuilder();
                        metric.getAlias().stream().forEach(a -> alias.append(a + ","));
                        metricStr.append(" ALIAS '" + alias + "'");
                    }
                    if (StringUtils.isNotEmpty(metric.getDescription())) {
                        metricStr.append(" COMMENT '" + metric.getDescription() + "'");
                    }
                    if (StringUtils.isNotEmpty(metric.getDefaultAgg())) {
                        metricStr.append(" AGGREGATE '" + metric.getDefaultAgg().toUpperCase() + "'");
                    }
                    metricStr.append(">");
                    metrics.add(metricStr.toString());
                }
        );

        List<String> dimensions = Lists.newArrayList();
        llmReq.getSchema().getDimensions().stream().forEach(
                dimension -> {
                    StringBuilder dimensionStr = new StringBuilder();
                    dimensionStr.append("<");
                    dimensionStr.append(dimension.getName());
                    if (!CollectionUtils.isEmpty(dimension.getAlias())) {
                        StringBuilder alias = new StringBuilder();
                        dimension.getAlias().stream().forEach(a -> alias.append(a + ","));
                        dimensionStr.append(" ALIAS '" + alias + "'");
                    }
                    if (StringUtils.isNotEmpty(dimension.getDescription())) {
                        dimensionStr.append(" COMMENT '" + dimension.getDescription() + "'");
                    }
                    dimensionStr.append(">");
                    dimensions.add(dimensionStr.toString());
                }
        );

        List<String> values = Lists.newArrayList();
        llmReq.getLinking().stream().forEach(
                value -> {
                    StringBuilder valueStr = new StringBuilder();
                    String fieldName = value.getFieldName();
                    String fieldValue = value.getFieldValue();
                    valueStr.append(String.format("<%s='%s'>", fieldName, fieldValue));
                    values.add(valueStr.toString());
                }
        );

        String template = "Table=[%s], Metrics=[%s], Dimensions=[%s], Values=[%s]";
        return String.format(template, tableStr, String.join(",", metrics),
                String.join(",", dimensions), String.join(",", values));
    }

    private String buildTermStr(LLMReq llmReq) {
        List<LLMReq.Term> terms = llmReq.getSchema().getTerms();
        List<String> termStr = Lists.newArrayList();
        terms.stream().forEach(
                term -> {
                    StringBuilder termsDesc = new StringBuilder();
                    String description = term.getDescription();
                    termsDesc.append(String.format("<%s COMMENT '%s'>", term.getName(), description));
                    termStr.add(termsDesc.toString());
                }
        );
        String ret = "";
        if (termStr.size() > 0) {
            ret = String.join(",", termStr);
        }

        return ret;
    }

}
